According to Vietnam IP Law 2005, technical solution – the object protected under the name of an invention is a set of necessary and sufficient information on technical methods and / or technical means (application of natural laws) which is intended to solve a mission (a problem).
Technical solution is including: Products in the form of substances (including simple substances, compounds and mixtures), for example materials, food, pharmaceuticals …, expressed in set of information that identifies an artificial product characterized by technical signs (characteristics) of the presence, proportion and state of the elements, functioning (utilizing) as a means to meet certain needs of human.
Therefore, compounds, salts and polymorphs are patentable in Vietnam.